Polymer emulsions for use in crude oil recovery

a technology of polymer emulsions and crude oil, which is applied in the direction of fluid removal, chemistry apparatus and processes, and wellbore/well accessories, etc., can solve the problems of poor sweep efficiency, and low molecular weight recovery, so as to increase improve the recovery of crude oil. , the effect of increasing the recovery of crude oil
US20160032170A1Active Publication Date: 2016-02-04CHAMPIONX USA INC
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
CHAMPIONX USA INC
Publication Date
2016-02-04

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Abstract

Emulsions of mobility control polymers can be used to increase recovery of crude oil from a subterranean hydrocarbon-containing formation. A flooding fluid comprising the polymer emulsions are injected into a well that is in contact with the subterranean hydrocarbon-containing formation. The polymers can be temporarily cross-linked and have protected shear degradation and improved injectivity into the well; the shear resistance can be measured in terms of viscosity loss due to shear, and the improved injectivity can be measured in terms of the flooding fluid's filter ratio, flow rate, and viscosity.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to improved emulsions of mobility control polymers that can be used to increase recovery of crude oil from a subterranean hydrocarbon-containing formation. A flooding fluid comprising the polymer emulsions are injected into a well that is in contact with the subterranean hydrocarbon-containing formation. The polymers can be temporarily cross-linked via labile cross-linking moieties resulting in shear protection and improved injectivity into the well Shear protection can be measured in terms of viscosity loss due to shear, and the improved injectivity can be measured in terms of the flooding fluid's filter ratio, flow rate, and viscosity.BACKGROUND OF THE INVENTION

[0002] In the recovery of oil from oil-bearing reservoirs, it is typically possible to recover only minor portions of the original oil in place by primary recovery methods which utilize only the natural forces present in the reservoir. Thus a variety of supplemental t...

Claims

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